NULL Pointer Dereference Affecting httpd:2.4/mod_session package, versions <0:2.4.37-47.module+el8.6.0+14529+083145da.1


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.13% (49th percentile)

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  • Snyk IDSNYK-RHEL8-HTTPD-4247009
  • published17 Aug 2021
  • disclosed5 Aug 2021

Introduced: 5 Aug 2021

CVE-2021-33193  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade RHEL:8 httpd:2.4/mod_session to version 0:2.4.37-47.module+el8.6.0+14529+083145da.1 or higher.
This issue was patched in RHSA-2022:1915.

NVD Description

Note: Versions mentioned in the description apply only to the upstream httpd:2.4/mod_session package and not the httpd:2.4/mod_session package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.

References

CVSS Scores

version 3.1